Husqvarna 426LST Manuel D'utilisation page 15

4. Turn the idle adjustment screw T clockwise until the
cutting attachment starts to rotate
.
5. Turn the screw counterclockwise until the cutting
attachment stops.
WARNING: If the cutting attachment
does not stop when you adjust the idle
speed, turn to your nearest servicing
dealer. Do not use the product until it is
correctly adjusted or repaired.
6. Make sure the engine run smoothly in all positions.
To do maintenance on the muffler
WARNING: The muffler decreases the noise
level and points the exhaust gases away
from the operator. The exhaust gases are
hot and can contain sparks. This can cause
fire if pointed against dry and flammable
material.
WARNING: Mufflers with catalytic converters
become hot during operation. Risk of burn or
fire. This also applies at idle speed. To
examine if your product has a catalytic
converter, refer to
18 .
Note: Clean the spark arrester screen weekly on
mufflers without a catalytic converter and on mufflers
with a catalytic converter this must be done monthly.
1. Stop the engine and let the muffler become cool.
1189 - 001 - 08.07.2019
T
Technical data on page
2. Remove the muffler cover.
3. Replace the spark arrester screen if it is damaged.
4. Remove the spark arrester screen.
5. Clean the spark arrester screen with a wire brush.
Remove dirt from the inlet and outlet of the muffler
with the wire brush.
6. Attach the spark arrester screen.
CAUTION: If the spark arrester screen is
frequently blocked, it can be a sign that
performance of the catalytic converter is
decreased. Speak to your servicing
dealer to examine the muffler. A blocked
spark arrester screen causes
overheating and results in damage to the
cylinder and piston.
To do maintenance on the trimmer
head
1. Only use the recommended cutting attachment and
cutting attachment guard. Refer to
page 19 .
2. Make sure that the cutter on the cutting attachment
guard is not damaged, it cuts the cord to the correct
length.
3. Install the cord as the illustrations on the last pages
of the manual shows.
To clean the cooling system
CAUTION: A dirty or blocked cooling system
can make the product too hot, which can
cause damage to the product.
The cooling system includes:
• The cooling fins on the cylinder (A).
• The air intake (B).
Accessories on
15